List of analyses by HERAFitter
 General HERAFitter related plots
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Logo of HERAFitter 

Timefllow HERAFitter 

Developers HERAFitter 

Workflow HERAFitter 

NAF Workflow HERAFitter 
QCD analysis of W and Zboson production at Tevatron [arXiv:1503.05221]
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Figure 1 Theoretical predictions evaluated with the PDFs extracted from a fit to the HERA I and Tevatron data are compared to (a) Zboson differential cross section as a function of rapidity, measured by the D0 collaboration and (b) Zboson differential cross section as a function of rapidity, measured by the CDF collaboration 

Figure 2 Theoretical predictions evaluated with the PDFs extracted from a fit to the HERA I and Tevatron data are compared to (a) the charge asymmetry of muons as a function of rapidity in W > μ nu decays, measured by the D0 collaboration, (b) the Wboson charge asymmetry as a function of rapidity in the W > e nu decay channel, measured by the CDF collaboration, and (c) the Wboson charge asymmetry as a function of rapidity in the W > e nu decay channel, measured by the D0 collaboration. 

Figure 3 PDFs at the starting scale Q2 = 1.7 GeV2 as a function of Bjorkenx for (a) uv, (b) dv, (c) ubar, and (d) dbar, determined with a fit to the HERA I data (blue), and with a fit to the HERA I and Tevatron W and Zboson data (yellow) 

Figure 4 Relative PDF uncertainties at the starting scale Q2 = 1.7 GeV2 as a function of Bjorkenx for (a) uv, (b) dv, (c) ubar, and (d) dbar, determined with a fit to the HERA I data (blue), and with a fit to the HERA I and Tevatron W and Zboson data (yellow) 

Figure 5 (a) dvalence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorkenx and (b) dvalence relative PDF uncertainties, determined with a fit to the HERA I data (blue), with a fit to the HERA I and Tevatron Wboson asymmetry and Zboson data (yellow), and with a fit to the HERA I and Tevatron Wboson lepton asymmetry and Zboson data (green) 

Figure 6 dvalence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorkenx before and after profiling for the (a) CT10nlo and (c) MMHT2014 PDFs and the corresponding relative uncertainties for (b) CT10nlo and (c) MMHT2014 

Figure 7 (a) dvalence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorkenx determined from a fit to the HERA I and Tevatron W and Zboson data, and from the CT10nlo and MMHT2014 PDFs; (b) ratio of dvalence PDFs central values and uncertainties with respect to the dvalence PDF determined from a fit the HERA I and Tevatron W and Zboson data 

Figure 8 (a) dvalence PDF at the scale Q2 = 1.7 GeV2 as a function of Bjorkenx determined from a fit to the HERA I and Tevatron W and Zboson data, and from the profiled CT10nlo and MMHT2014 PDFs; (b) ratio of dvalence PDFs central values and uncertainties with respect to the dvalence PDF determined from a fit the HERA I and Tevatron W and Zboson data 
Supplementary Material
Theoretical predictions evaluated with the CT10nlo (red) MMHT2014 (blu) and NNPDF3.0 (green) PDF sets are compared to the Wboson charge asymmetry as a function of rapidity in the W > e nu decay channel, measured by the D0 collaboration. The dashed areas correspond to the PDF uncertainties of the theoretical predictions. The yellow bands show the total experimental uncertainty, the black vertical bars show the quadratic sum of statistical and systematic uncorrelated uncertainties 
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Parton distribution functions at LO, NLO and NNLO with correlated uncertainties between orders [EPJC (2014) 74: 3039, arXiv:1404.4234]
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Distribution of chi2/Ndof for fits to 1337 data replicas at LO, NLO and NNLO. The vertical line indicates the expected mean value of the chi2 distribution for the fits to the data replicas in the MC method (2 Ndof) 

Correlation of chi2/Ndof between NLO and NNLO fits 

NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (uval). 
q2_2_pdf_uvepsconvertedto.pdf, q2_2_pdf_uv_ratioepsconvertedto.pdf 
NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (dval). 
q2_2_pdf_dvepsconvertedto.pdf, q2_2_pdf_dv_ratioepsconvertedto.pdf 
NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (UBar). 
q2_2_pdf_UBarepsconvertedto.pdf, q2_2_pdf_Ubar_ratioepsconvertedto.pdf 
NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (DBar). 
q2_2_pdf_DBarepsconvertedto.pdf, q2_2_pdf_DBar_ratioepsconvertedto.pdf 
NLO PDFs with the experimental uncertainty bands as well as the relative uncertainties determined by the MC method and its eigenvector representation (g). 
q2_2_pdf_gepsconvertedto.pdf, q2_2_pdf_g_ratioepsconvertedto.pdf 
Correlation coefficients, given in percent and represented by different colours, among different PDFs at NLO and NNLO at the starting scale Q2=1.7GeV2 and xgrid points. From top to bottom, the panels show correlation coefficients for the xuv, xdv, xUBar, xDBar and xg distributions. The left column corresponds to the original MCmethod calculation and the right shows the result of the eigenvector representation. Each panel shows the correlation coefficients as a function of the xgrid point for the NLO (bins 197) and NNLO (bins 98194) PDFs. Bins 0, 27, 43, 62, 78 and 97 correspond to anchor points at x=0.00001, 0.01, 0.1, 0.4, 0.7 and 1.0 with logarithmic x spacing between them. 
uv_corr.pdf, dv_corr.pdf, ubar_corr.pdf, dbar_corr.pdf, g_corr.pdf 
Correlation of the crosssection predictions for Z boson production calculated at NLO and NNLO. 

Correlation of the crosssection predictions for WW diboson and Z boson production both calculated at NLO 

Correlation of the crosssection predictions for WW diboson calculated at NLO and Z boson production both calculated at NNLO 

Ratio of the WW diboson to Z boson production cross sections calculated at NLO and NLO/NNLO compared to the result obtained by the CMS collaboration (hatched area). The inner, middle and outer filled error bars of the predictions indicate experimental and full PDF uncertainties and the total uncertainty calculated as the scale and full PDF uncertainties added in quadrature, respectively. 
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